Improvement in the manufacture of jewelers  stock



UNITED STA-ms @PATENT FFIGE.

THnoDoRE DIEBoLD, Ja., yon New vonk, N. Y.

IMPROVEMENT IN THE MANUFACTURE OF JEWELERS STOCK.

Speclcation forming part of Letters Patent No. 133,835, dated December 10, 1872.

To all whom it may concern.'

Beit known that I, THEonoRn DIEBoLD, Jr., of the city, county, and State of New York, have invented certain new and'useful Improvements in Jewelers Stock and rolls for manufacturing the same, of which the following is a specification: 4

In the drawing, Figure l is an elevation of abracelet made from my improved jewelers stock. Fig. 2 is a cross section of my improved jewelers stock, the same adapted to the manufacture of bracelets, the bottom plate being detached; andFig. 3 represents rollers by means of which I am enabled to groove or ornament the stock while forming the plate with the end pieces.

This invention has for its object to form a new and improved article known to the trade as jewelers stock, designed especially for the manufacture of bracelets, whereby a bracelet is made stron ger-and at less cost.

The stock heretofore used by jewelers in the manufacture of bracelets necessitated the employment of four separate pieces and four j' joints. The necessity of such construction was due to the fact that there was no method known whereby the stock or top plate could be lornamented or grooved, unless such stock were plain or flat, as the plates were grooved by means of rollers, between which they were passed, andl no construction of rollers 4was known that would operate on plates of irregular shape. Therefore the top plate was rolled and grooved, and the end plates or strips were made separate and afterward soldered to the edges of the top plate.

My improvement consists in producing a new form` of jewelers stock designed especially for use in manufacture of bracelets, the saine consisting in making the vtop plate and end pieces in one piece,I the ends projecting down 'at right angles with the top so as to receive the edges of a bottom plate, to which they are soldered, thereby requiring only two joints to unite the plates.

In order to enable me to groove and orna-` ment the top plate withits ends projecting downward in this manner, I have adopted the following method, which composes part of my invention.

I form vertical anges on the ends of the 'throu gh the rollers.

.is grooved and arranged thereon, so that the vertical end of the top plate can pass between them and the ends of the female roller, thereby allowing the periphery of the top to be acted on and its grooves perfected without injury to the ends from their passage The faces of the rollers are so constructed and set that they take hold of the top plate between the convex and concave portions of their faces by which the grooves are produced, and thus I preserve the plate from being changed in curvature by the operation of the rollers.

Fig. 1 shows a bracelet made from the improved stock according to my invention, the same being shown in longitudinal section, the letter A designating the top plate with its vertical ends a formed in one piece with it, and B the bottom plate.

Fig. 2 illustrates the top and bottom plates detached from each other. These plates are soldered to each other at the points where the vertical ends meet the edges of the bottom plate.

Fig. 3 represents a pair of rollers, C D, suitable for grooving the top plate, as above explained. The male roller O is provided with vertical flanges E E, which project from its ends so as to overlap the ends of the female roller, the rollers being constructed and set in such a manner that the top plate with the vertical ends can pass between them, as is illustrated in the figure, which shows the top plate between the rollers, the parts of the plate which are held and acted on by the rollers being the parts which come between the convex heads c of the male roller and concave depressions d of the otherV roller, the other parts being allowed to pass through without pressure. That portion of the male roller which acts upon the top portion of the plate, in addition to the beads and grooves, may be provided with any desired design or ornamental figure raised upon its surface, while the surface of the female roller will Vbe recessed with corresponding designs or ornamental figures, so as to impart to the said top Y plate, in its passage between the rolls, a highlyattractive ornamental surface.'

Having` thus described my invention, what I claim as new, and desire ters Patent, is

1. As a new article of manufacture, jewelers stock, consisting of the plate A formed in one piece with the depending end pieces a a, and grooved or ornamented, substantially as herein shown and set forth,

2. The rolls G D, constructed essentially as to secure by Letdescribed, for the purpose of forming the improved j ewelers stock herein shown, for the purpose specified.

THEODORE DIEBOLD, JR.

Witnesses:

J. VAN SANTVOORD, E. F. KASTENHUBEB. 

